Results 41 to 50 of about 14,205 (282)
Abstract and Applied Analysis, 2014 We extend the notion of (αψ, βφ)-contractive mapping, a very recent concept by Berzig and Karapinar. This allows us to consider contractive conditions that generalize a wide range of nonexpansive mappings in the setting of metric spaces provided with ...
Maher Berzig +2 more
doaj +1 more source
Fixed point theorems for $\alpha$--contractive mappings of Meir--Keeler type and applications
, 2013 In this paper, we introduce the notion of $\alpha$--contractive mapping of Meir--Keeler type in complete metric spaces and prove new theorems which assure the existence, uniqueness and iterative approximation of the fixed point for this type of ...
Berzig, Maher, Rus, Mircea-Dan
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A stochastic contraction mapping theorem
Systems & Control Letters, 2023 27 pages, one ...
openaire +3 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
Some fixed point results in fuzzy metric spaces using a control function [PDF]
Surveys in Mathematics and its Applications, 2017 In this paper, we establish the results on existence and uniqueness of fixed point for φ-contractive and generalized C-contractive mapping in the fuzzy metric space in the sense of George and Veeramani.
C. T. Aage +2 more
doaj
Unbounded Local Completely Contractive Maps
Bulletin of the Iranian Mathematical Society, 2022 We prove a local convex version of Arveson's extension theorem and of Wittstock's extension theorem. Also we prove a Stinespring type theorem for unbounded local completely contractive maps.
openaire +3 more sources
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
A strong convergence theorem on generalized equilibrium problems and strictly pseudocontractive mappings; pp. 12–24 [PDF]
Proceedings of the Estonian Academy of Sciences, 2011 In this paper, we consider a general iterative process for a generalized equilibrium problem and a strictly pseudo-contractive mapping. A strong convergence theorem of common elements of the fixed point sets of the strictly pseudocontractive mapping and ...
Yan Hao
doaj +1 more source
Fixed point theorems for asymptotically contractive mappings [PDF]
, 2003 In this short paper, we prove fixed point theorems for nonexpansive mappings whose domains are unbounded subsets of Banach spaces. These theorems are generalizations of Penot's result in [Proc. Amer. Math.
Suzuki, Tomonari
core +4 more sources